unaccompanied >> ʌnəˈkʌmpənɪd
Definition: [adjective] having no companion or escort.
Example: no unaccompanied children allowed
Definition: [adjective] taking place without something specified taking place at the same time.
Example: the political change was unaccompanied by social change
Definition: [adjective] (of a piece of music) sung or played without instrumental accompaniment.
Example: an unaccompanied violin elegy